What are the specs for this Limit Switch?

The correct replacement for Goodman model AMH80903BXCB — 20162906 is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Goodman equipment which lists the model number AMH80903BXCB — 20162906.

What symptoms indicate I need a new limit switch?

Common symptoms that indicate you need a new limit switch include unusual noises, intermittent operation, complete failure to operate, or visible damage. For specific diagnostic guidance, visit nationalhvacparts.com/pages/hvac-diagnostic.

Is this limit switch compatible with Bryant or Payne systems too?

Many Goodman parts are cross-compatible with Bryant and Payne systems since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across multiple brand labels with different model numbers. To verify cross-compatibility, check your Bryant or Payne equipment service manual for cross-compatible part numbers, or contact info@nationalhvacparts.com with your model number for confirmation.

IMAGE COMING SOON

Goodman

OEM Goodman M4 Primary Limit Switch for AMH80903BXCB — 20162906

Name: OEM Goodman M4 Primary Limit Switch for AMH80903BXCB — 20162906
Brand: Goodman
SKU: GOODMAN-5747
Price: 27.95 USD
Availability: InStock

SKU: GOODMAN-5747 Brand: Goodman

$27.95 $36.95

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014

SAM.gov Registered

Govt POs Accepted

The Goodman 20162906 M4 Primary Limit Switch is a genuine OEM temperature-sensing safety control for Amana/Goodman AMH80903BXCB gas furnaces. Mounted in the heat-exchanger plenum, this primary limit continuously monitors supply-air temperature and shuts off the burners if the furnace overheats due to restricted airflow, a dirty filter, or blower failure. It is a first line of defense against heat-exchanger cracking and unsafe operating temperatures.

Specifications

Type: M4 primary high-limit switch
OEM Part Number: 20162906
Reset: Automatic (temperature-based)
Function: Interrupts gas valve on over-temperature
Fits: Goodman & Amana AMH80903BXCB and compatible furnaces
Mounting: Plenum/heat-exchanger bracket, factory footprint

OEM vs. Generic

Primary limits are calibrated to a specific open/close temperature matched to your furnace's heat-exchanger design. This genuine OEM M4 switch guarantees the correct trip point and insertion depth. Generic substitutes risk nuisance lockouts or, worse, failing to protect the exchanger. For safety-critical controls, OEM is the recommended choice.

Installation Difficulty

Easy (2 of 5). Cut power and gas, remove two mounting screws, transfer the wire leads, and seat the new limit at the same depth. Confirm normal cycling after install. Persistent tripping indicates an airflow problem that should be diagnosed by a technician.

Shipping Information

Orders placed before 3PM CST ship same business day
Standard delivery: 2-5 business days
Express shipping available at checkout
Free shipping on orders over $75
Tracking number emailed upon shipment

Return Policy

30-day returns on unused parts in original packaging
Electrical parts (capacitors, contactors, control boards) are final sale once installed
Email info@nationalhvacparts.com to initiate a return
Refunds processed within 5-7 business days

OEM Goodman M4 Primary Limit Swi...

$27.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman AMH80903BXCB — 20162906?

Yes. This is the factory-specified OEM limit switch for the Goodman AMH80903BXCB — 20162906. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.

How do I replace the limit switch on my Goodman AMH80903BXCB — 20162906?

Refer to your equipment service manual for model-specific steps. General approach: turn off power, photograph connections, remove old part, install new part, restore power and test. For gas components, hire a licensed technician. Email info@nationalhvacparts.com for guidance.

What symptoms mean I need a new limit switch?

Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.

Is this limit switch compatible with Bryant or Payne too?

Many Goodman parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.

Should I use OEM or aftermarket for my Goodman limit switch?

OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.

How fast does National HVAC Parts ship?

Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.

Menu